The mystery Box needs fixing!

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Hello dear viewer!

I come to this part of the forum to hopefully get some advice or basic knowledge.
In all honesty I have pretty much not a clue about anything at this point, but obviously need to start somewhere with doing home improvements.

I am very doubt full I will do things on my own, but without any knowledge it is rather difficult to even remotely asses who you should hire or approach a problem. I also realized recently I have quite the blind spot when it comes to handy stuff and need to fix that at least a little bit.

I am uploading pictures of the fuse box for you guys to have a general look and I am hoping for some feedback, advice, information in regards to (and anything else, cause honesty I do not even know what I should ask):

The current issues are the following:

Some parts of the house the electricity doesnt work any more (well duhh, some of the fuses are turned off) - Bathroom (ground floor) has light but the contacts where our heater was connected to is not working any more and the other contacts in the bathroom neither - Kids have no light in their room, contacts in their room work though.
The fuses as seen in the picture, which are turned off right now can not be turned on. They either directly popp out again, or lead to a take out of all other fuses as well (I think, but maybe its just the main fuses - is it relevant information?)


Anything on first sight looking weird?


#4 The grey cable seems to be where the electricity is coming in. and ends up going from top inside the first fuse (see #5)
#5 Is that the main electricity coming in? Those cable look thin as heck?
#7 The big red cables "move" electricity from the bottom first fuse to the top part of the second fuse? Why are there seemingly two same fuses next to each other? Is there a functionality reason for it?
#6 What are those cables? Is it like a grounding thing or something? What exactly does that even mean? :D
#3 So we got some serious red cables again! But it seems a bit weird, that it seems that the electricity comes in from the top (#8) and goes out on the bottom? So really thin cables to really thick cables? That seems weird.
#1 and #2 are the fuses who keep being knocked out and I can not put them back into "on". Is it possible that the "fuse" is broken and simply needs replacing (I remember from 35 years ago when we had those old school fuses which needed to have a part replaced, when they blew)?

Also what is the yellow looking box thing above the fuse box?

Do I assume correctly that the electricity flows somewhere behind the fuses? Meaning it goes through the fuse to either blue/brown, and then circles back into the fuse through brown/blue?

Ah, and the red cables are connected to the big boy conductor on the bottom to the big boy conductor on the top? And the two fuses in the beginning #7 safeguards the incoming electricity and then guards the electro-city going to the conductor in the back of the bottom row?

Like I said I have no clue - please share knowledge, ask question, feedback or whatever. I am super green and for any progress on knowledge very ... its appreciated :) and I am excited on the progress already made, haha

-P
 

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